WFS API

From the dataset abstract

Buildings and areas protected by detailed plans in Helsinki.

The coordinate system of the dataset is ETRS-GK25.

The data can be downloaded in GML, KML, Excel, DWG, DXF, GeoPackage, MapInfo (TAB & MIF) and Esri Shape formats from the [kartta.hel.fi]( service. On the left side of the page, there is a “Download” button, which opens a window. You must first define the geographic scope of the data (e.g. only the level features that are currently displayed in the map window). After this, the various download options will open.

In addition, the buildings protected by detailed plans as area-type features can be accessed through the City of Helsinki’s WFS interface. Layer name on the interface:

Previewing the data in the kartta.hel.fi service:*

• Both Areas and Buildings protected by detailed plans-layers active
• All map layers can be found on the website: https://kartta.hel.fi/ > Layers > Cultural Environments

API addresses:

• WFS API: https://kartta.hel.fi/ws/geoserver/avoindata/wfs

Layers:

• Asemakaavoissa_suojellut_rakennukset_alue

The owner and maintainer of the content of the Asemakaavoissa_suojellut_rakennukset_alue data is the City of Helsinki Urban Environment Division/Detailed Planning.

Source: Asemakaavoilla suojellut rakennukset ja alueet Helsingissä